Oversized or undersized shoe?

I'm in a dilemma right now, found a pair of dope shoes but they don't have them in my ''real'' size, I usually wear 9,5 or 10 depending on what shoes they're but they only got 9,0 and 10,5 -.- I know its only a 1/2 size up and down but for me its a kinda big difference, 10,5 feels too big both width and length actually and 42,5 feels a lil bit tight in width and length... So I don't know what I should do know and YES I must have them haha.

Should I get the oversized one or undersized? I've heard that you put different things in the oversized but seems uncomfortable? And you can stretch out the undersized... what should I do?

Also I prefer the undersized because the oversized looks too bulky/big ;S

Oversized of course. You can always add an insole or double sock.
Undersized, you'll just be uncomfortable. I highly doubt Jordans will stretch.
However, undersize might be ok, if the insole is removable, and you wear them without the insole.

What jordans are you getting ?
it really depends I had a few that was undersized.1's- 5's 9's&amp;13s you could get undersized but if your getting like some 6's-12's you could get a size up.DO NOT GET 13s a size up they will look like clown shoes.I got them in a 10'5 they look like boats on me.I got some 3's a size 9 and they fit good.I wear 9.5 and 10

Damn two insoles seems like a bit much. I could see your foot slipping out really easy. Maybe thick socks and a thick insole. Or if that's not enough then you could always do it old school and cut out a fairly thin tongue from an older beat shoe and put a little piece of grip tape on the top of it and wear it under the tongue. I did that with my blazers and it fits hella snug

I say oversize reason being you can either put another sole or double sock it. Now if your foot is slipping all the way out then get the undersize and they will probably stretch. You can also tie them tighter that sometimes work.

for the most part i'm gonna go with the folks sayin oversize, because the last thing you want to do is to fuck your feet up over some kicks. that being said there are conditions in which buying a smaller size is fine, but that usually is in the case of quality leather shoes like say a pair of common projects, there is no padding so for the most part, and the leather stretches and molds with wear and form with your foot. jordan 3s really don't fall into my example, so size up or don't bother, just save your money.